Every section earns its place. The skill assumes Claude's intelligence, avoids explaining what SvelteKit or SSR is, and uses terse numbered principles with minimal prose. Code examples are short and contrastive (❌/✅ pairs) rather than tutorial-style. The common mistakes list is a dense lookup table, not a narrative.

Provides executable TypeScript code examples with clear ❌/✅ contrasts, specific file names (+page.server.ts, hooks.server.ts), concrete API calls (fail(), redirect(), throw), and a quick-reference table mapping smells to exact moves. The form action flow and route protection checklists are copy-paste-ready workflows.

The 'Working Through a Change' section provides a clear outside-in sequence with explicit validation checkpoints at each step (e.g., 'Confirm secrets never reach +page.ts', 'Test a direct HTTP call to each endpoint', 'Render with JS off'). The form action flow and protecting routes sub-workflows both end with explicit verification steps ('Check: submit with JavaScript disabled').

The SKILL.md is a well-structured overview with 12 clearly signaled one-level-deep references to specific topic files (file-naming.md, auth.md, load-functions.md, etc.). Each principle links to its detailed reference, and a reference index at the bottom provides easy navigation. Content is appropriately split between the overview and referenced files.

The description names the domain (SvelteKit apps) and lists many relevant concepts (routes, layouts, load functions, form actions, hooks, auth, cookies, etc.), but it describes itself as a 'mental-model reset' rather than listing concrete actions it performs. The actions are implied ('writing or reviewing') but not comprehensively described as specific operations.

Clearly answers both 'what' (mental-model reset for SvelteKit apps covering routes, layouts, load functions, etc.) and 'when' (explicit 'Use when...' clause with detailed triggers, plus a 'Triggers on' list). Also helpfully distinguishes scope from a related skill (svelte5) to clarify boundaries.

Excellent coverage of natural trigger terms users would actually use: includes file naming conventions (+page, +server, +page.server.ts, hooks.server.ts), function names (fail(), redirect(), error(), load), concepts (SSR, hydration, progressive enhancement), and framework-specific terms (locals, route groups, enhance). This is comprehensive and matches how developers naturally talk about SvelteKit.

Highly distinctive with SvelteKit-specific triggers that are unlikely to conflict with other skills. The description explicitly delineates its boundary from a sibling 'svelte5' skill for component-level concerns, which further reduces conflict risk.